Improvement in superheaters for steam-boilers



H. SOHAUBEL. Superheater for Steam-Boilers.

WITNESSES IN VENTOR NPETERQ. PHOTO-UTHOGRAPHER. WASHINGTON. D C,

UNITED STATES PATENT OFFICE.

HENRY SCHAUBEL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF OFHIS RIGHT TO EDMUND L. LEVY, OF SAME PLACE.

IMPROVEMENT lN SUPERHEATERS FOR STEAM-BOILERS.

Specification forming part of Letters Patent No. 220,670, dated October14, 1879; application filed July 28, 1879.

To all whom it may concern:

Be it known that I, HENRY SGHAUBEL, of Philadelphia, Pennsylvania, haveinvented a new and useful Improvement in Superheaters -forSteam-Boilers, of which the following is a specification.

My invention relates to that class of superheaters for steamboilers inwhich a superheating-chamber is combined with achimney and my improx edsuperheater consists of an outer casing combined with an inner casing,which forms a detachable section of the chimney, but which ispermanently secured to the said outer casin g, the main object of myinvention being to avoid theexpense incurred in securing the superheaterdirectly to the shell of the boiler, as usual, a further object being topermit the ready removal of the superheater and the ready application ofa new one.

In the accompanying drawings, Figure I is a vertical section of asteam-boiler, illustrating my invention; Fig. 2, a plan view of thesame, and Fig. 3 a modification.

The boiler to which myinvention is applied in the present instance is ofthe marineflue and return-tubular type; but it will be understood thatit may be used in connection with all kinds of steam-generators.

A represents the shell of the steam-boiler; a, the trout tubesheet; b,the smoke-chamber; B, the superheating-chamber; d, the outer casing ofthe same; 6, the inner casing; D, the chimney, and h the pipe forming acommunication between the steam-space of the boiler and thesuperheating-chamber, which has also an appropriate out-let-pipe,'asshown by dotted lines.

The inner casing, e, of the super-heater constitutes a section of thechimney, the lower portion of this casing being bolted or riveted to abranch, f, on the shell of the boiler, and the hpper end to the chimneyproper, D.

Before the superheater is secured in its po sition it is a completestructure-that is to say, the inner and outer casings are permitnentlyriveted together, so as to be in a steamtight condition.

Several advantages are derived from this arrangement: First, theinconvenience and expense of securing the outer casing of thesuperheater to a continuous chimney in a steamtight condition isobviated; second, the superheater can be readily detached from thechimney for repairs or to make way for a new one; and, third, the boileris not weakened by cutting away the shell at the point where thesuperheater is attached.

In Fig. 3 I have shown a modification, in which the super-heater is madein duplex form, and is combined with apair of boilers having twooutlet-fines, the ordinary breeches-pipe being used at the top of thesuperheater.

I do not desire to claim, broadly, the combination of asuperheating-drum with a chimney which passes through the said drum butI claim as my inventionflhe combination of a superheater, consisting ofan outer casing, d, and inner casing, e, permanently secured together,with a chimney, the continuity of which is interrupted for the receptionof the superheater, the inner casing of the latter forming a partof thechimney, all as and for the purpose set forth.

In testimony whereofI have signed my name to this specification in thepresence of two subscribing witnesses.

HENRY SOHAUBEL.

Witnesses:

ALEXANDER PATTERSON, HARRY SMITH.

